Source: Schema.org v30.1 vocabulary. Official composer property definition.
What does composer mean?
The person or organization who wrote a composition, or who is the composer of a work performed at some event.
Used on types (domainIncludes)
Expected value types (rangeIncludes)
Schema.org domainIncludes and rangeIncludes are descriptive guidance, not strict validation prohibitions. Check the official reference for updates.
Related reference
Browse all Schema.org types and properties · Google feature support status